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Concentration in US Labor Markets: Evidence from Online Vacancy Data

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Listed:
  • Azar, José

    (IESE Business School)

  • Marinescu, Ioana E.

    (University of Pennsylvania)

  • Steinbaum, Marshall

    (University of Utah)

  • Taska, Bledi

    (Lightcast)

Abstract

Using data on the near-universe of online US job vacancies collected by Burning Glass Technologies in 2016, we calculate labor market concentration using the Herfindahl-Hirschman index (HHI) for each commuting zone by 6-digit SOC occupation. The average market has an HHI of 3,953, or the equivalent of 2.5 recruiting employers. 54% of labor markets are highly concentrated (above 2,500 HHI) according to the DOJ/FTC guidelines. Highly concentrated markets account for 17% of employment. All plausible alternative market definitions show that more than 33% of markets are highly concentrated, suggesting that employers have market power in many US labor markets.

Suggested Citation

  • Azar, José & Marinescu, Ioana E. & Steinbaum, Marshall & Taska, Bledi, 2018. "Concentration in US Labor Markets: Evidence from Online Vacancy Data," IZA Discussion Papers 11379, Institute of Labor Economics (IZA).
  • Handle: RePEc:iza:izadps:dp11379
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    1. John C. Haltiwanger & Henry R. Hyatt & Lisa B. Kahn & Erika McEntarfer, 2018. "Cyclical Job Ladders by Firm Size and Firm Wage," American Economic Journal: Macroeconomics, American Economic Association, vol. 10(2), pages 52-85, April.
    2. Steven Berry & Martin Gaynor & Fiona Scott Morton, 2019. "Do Increasing Markups Matter? Lessons from Empirical Industrial Organization," Journal of Economic Perspectives, American Economic Association, vol. 33(3), pages 44-68, Summer.
    3. Manning, Alan, 2011. "Imperfect Competition in the Labor Market," Handbook of Labor Economics, in: O. Ashenfelter & D. Card (ed.), Handbook of Labor Economics, edition 1, volume 4, chapter 11, pages 973-1041, Elsevier.
    4. Jae Song & David J Price & Fatih Guvenen & Nicholas Bloom & Till von Wachter, 2019. "Firming Up Inequality," The Quarterly Journal of Economics, President and Fellows of Harvard College, vol. 134(1), pages 1-50.
    5. R. Jason Faberman & Andreas I. Mueller & Ayşegül Şahin & Giorgio Topa, 2022. "Job Search Behavior Among the Employed and Non‐Employed," Econometrica, Econometric Society, vol. 90(4), pages 1743-1779, July.
    6. Zack Cooper & Stuart V Craig & Martin Gaynor & John Van Reenen, 2019. "The Price Ain’t Right? Hospital Prices and Health Spending on the Privately Insured," The Quarterly Journal of Economics, President and Fellows of Harvard College, vol. 134(1), pages 51-107.
    7. Alan Manning & Barbara Petrongolo, 2017. "How Local Are Labor Markets? Evidence from a Spatial Job Search Model," American Economic Review, American Economic Association, vol. 107(10), pages 2877-2907, October.
    8. Michael R Ransom & David P. Sims, 2010. "Estimating the Firm's Labor Supply Curve in a "New Monopsony" Framework: Schoolteachers in Missouri," Journal of Labor Economics, University of Chicago Press, vol. 28(2), pages 331-355, April.
    9. Brad Hershbein & Lisa B. Kahn, 2018. "Do Recessions Accelerate Routine-Biased Technological Change? Evidence from Vacancy Postings," American Economic Review, American Economic Association, vol. 108(7), pages 1737-1772, July.
    10. Nathaniel Baum-Snow & Ronni Pavan, 2012. "Understanding the City Size Wage Gap," The Review of Economic Studies, Review of Economic Studies Ltd, vol. 79(1), pages 88-127.
    11. Arindrajit Dube & Ethan Kaplan, 2010. "Does Outsourcing Reduce Wages in the Low-Wage Service Occupations? Evidence from Janitors and Guards," ILR Review, Cornell University, ILR School, vol. 63(2), pages 287-306, January.
    12. Daniel Aaronson & Eric French & Isaac Sorkin & Ted To, 2018. "Industry Dynamics And The Minimum Wage: A Putty†Clay Approach," International Economic Review, Department of Economics, University of Pennsylvania and Osaka University Institute of Social and Economic Research Association, vol. 59(1), pages 51-84, February.
    13. David Autor & David Dorn & Lawrence F Katz & Christina Patterson & John Van Reenen, 2020. "The Fall of the Labor Share and the Rise of Superstar Firms [“Automation and New Tasks: How Technology Displaces and Reinstates Labor”]," The Quarterly Journal of Economics, President and Fellows of Harvard College, vol. 135(2), pages 645-709.
    14. Hyatt, Henry R. & Spletzer, James R., 2016. "The shifting job tenure distribution," Labour Economics, Elsevier, vol. 41(C), pages 363-377.
    15. Yankow, Jeffrey J., 2006. "Why do cities pay more? An empirical examination of some competing theories of the urban wage premium," Journal of Urban Economics, Elsevier, vol. 60(2), pages 139-161, September.
    16. Rafael Dix‐Carneiro, 2014. "Trade Liberalization and Labor Market Dynamics," Econometrica, Econometric Society, vol. 82(3), pages 825-885, May.
    17. Marinescu, Ioana & Ouss, Ivan & Pape, Louis-Daniel, 2021. "Wages, hires, and labor market concentration," Journal of Economic Behavior & Organization, Elsevier, vol. 184(C), pages 506-605.
    18. David Card & Ana Rute Cardoso & Joerg Heining & Patrick Kline, 2018. "Firms and Labor Market Inequality: Evidence and Some Theory," Journal of Labor Economics, University of Chicago Press, vol. 36(S1), pages 13-70.
    19. Ioana Marinescu & Ronald Wolthoff, 2020. "Opening the Black Box of the Matching Function: The Power of Words," Journal of Labor Economics, University of Chicago Press, vol. 38(2), pages 535-568.
    20. Zhongxian Men & Tony S. Wirjanto & Adam W. Kolkiewicz, 2016. "A Multiscale Stochastic Conditional Duration Model," Annals of Financial Economics (AFE), World Scientific Publishing Co. Pte. Ltd., vol. 11(04), pages 1-28, December.
    21. Douglas O. Staiger & Joanne Spetz & Ciaran S. Phibbs, 2010. "Is There Monopsony in the Labor Market? Evidence from a Natural Experiment," Journal of Labor Economics, University of Chicago Press, vol. 28(2), pages 211-236, April.
    22. Claudia Macaluso, 2017. "Skill Remoteness and Post-layoff Labor Market Outcomes," 2017 Meeting Papers 569, Society for Economic Dynamics.
    23. Sharon Traiberman, 2019. "Occupations and Import Competition: Evidence from Denmark," American Economic Review, American Economic Association, vol. 109(12), pages 4260-4301, December.
    24. Webber, Douglas A., 2015. "Firm market power and the earnings distribution," Labour Economics, Elsevier, vol. 35(C), pages 123-134.
    25. Raven Molloy & Christopher L. Smith & Riccardo Trezzi & Abigail Wozniak, 2016. "Understanding Declining Fluidity in the U.S. Labor Market," Brookings Papers on Economic Activity, Economic Studies Program, The Brookings Institution, vol. 47(1 (Spring), pages 183-259.
    26. William M. Boal & Michael R. Ransom, 1997. "Monopsony in the Labor Market," Journal of Economic Literature, American Economic Association, vol. 35(1), pages 86-112, March.
    27. Alan Manning, 2010. "The plant size-place effect: agglomeration and monopsony in labour markets," Journal of Economic Geography, Oxford University Press, vol. 10(5), pages 717-744, September.
    28. Sharon Traiberman, 2017. "Occupations and Import Competition," 2017 Meeting Papers 1237, Society for Economic Dynamics.
    29. Steven J. Davis & R. Jason Faberman & John C. Haltiwanger, 2013. "The Establishment-Level Behavior of Vacancies and Hiring," The Quarterly Journal of Economics, President and Fellows of Harvard College, vol. 128(2), pages 581-622.
    30. Jan De Loecker & Jan Eeckhout & Gabriel Unger, 2020. "The Rise of Market Power and the Macroeconomic Implications [“Econometric Tools for Analyzing Market Outcomes”]," The Quarterly Journal of Economics, President and Fellows of Harvard College, vol. 135(2), pages 561-644.
    31. Erhan Artuç & Shubham Chaudhuri & John McLaren, 2010. "Trade Shocks and Labor Adjustment: A Structural Empirical Approach," American Economic Review, American Economic Association, vol. 100(3), pages 1008-1045, June.
    32. Torberg Falch, 2010. "The Elasticity of Labor Supply at the Establishment Level," Journal of Labor Economics, University of Chicago Press, vol. 28(2), pages 237-266, April.
    33. Henry R. Hyatt & James R. Spletzer, 2016. "The Shifting Job Tenure Distribution†," Working Papers 16-12r, Center for Economic Studies, U.S. Census Bureau.
    34. Jordan D. Matsudaira, 2014. "Monopsony in the Low-Wage Labor Market? Evidence from Minimum Nurse Staffing Regulations," The Review of Economics and Statistics, MIT Press, vol. 96(1), pages 92-102, March.
    35. Ioana Marinescu & Roland Rathelot, 2018. "Mismatch Unemployment and the Geography of Job Search," American Economic Journal: Macroeconomics, American Economic Association, vol. 10(3), pages 42-70, July.
    36. Arindrajit Dube & T. William Lester & Michael Reich, 2010. "Minimum Wage Effects Across State Borders: Estimates Using Contiguous Counties," The Review of Economics and Statistics, MIT Press, vol. 92(4), pages 945-964, November.
    37. David Deming & Lisa B. Kahn, 2018. "Skill Requirements across Firms and Labor Markets: Evidence from Job Postings for Professionals," Journal of Labor Economics, University of Chicago Press, vol. 36(S1), pages 337-369.
    38. Peter A. Diamond & Aysegül Sahin, 2016. "Disaggregating the Matching Function," CESifo Working Paper Series 6266, CESifo.
    39. Arindrajit Dube & T. William Lester & Michael Reich, 2016. "Minimum Wage Shocks, Employment Flows, and Labor Market Frictions," Journal of Labor Economics, University of Chicago Press, vol. 34(3), pages 663-704.
    40. Artuç, Erhan & McLaren, John, 2015. "Trade policy and wage inequality: A structural analysis with occupational and sectoral mobility," Journal of International Economics, Elsevier, vol. 97(2), pages 278-294.
    41. Philip S. Morrison & William A.V. Clark, 2016. "Loss aversion and duration of residence," Demographic Research, Max Planck Institute for Demographic Research, Rostock, Germany, vol. 35(36), pages 1079-1100.
    42. Efraim Benmelech & Nittai K. Bergman & Hyunseob Kim, 2022. "Strong Employers and Weak Employees: How Does Employer Concentration Affect Wages?," Journal of Human Resources, University of Wisconsin Press, vol. 57(S), pages 200-250.
    43. Yue Qiu & Aaron Sojourner, 2023. "Labor-Market Concentration and Labor Compensation," ILR Review, Cornell University, ILR School, vol. 76(3), pages 475-503, May.
    44. Arindrajit Dube & Jeff Jacobs & Suresh Naidu & Siddharth Suri, 2020. "Monopsony in Online Labor Markets," American Economic Review: Insights, American Economic Association, vol. 2(1), pages 33-46, March.
    45. Orley C. Ashenfelter & Daniel S. Hosken & Matthew C. Weinberg, 2013. "The Price Effects of a Large Merger of Manufacturers: A Case Study of Maytag-Whirlpool," American Economic Journal: Economic Policy, American Economic Association, vol. 5(1), pages 239-261, February.
    46. James Spletzer & Elizabeth Weber Handwerker, 2015. "The Role of Establishments and the Concentration of Occupations in Wage Inequality," Working Papers id:7427, eSocialSciences.
    47. Modestino, Alicia Sasser & Shoag, Daniel & Ballance, Joshua, 2016. "Downskilling: changes in employer skill requirements over the business cycle," Labour Economics, Elsevier, vol. 41(C), pages 333-347.
    48. Orley C. Ashenfelter & Henry Farber & Michael R Ransom, 2010. "Labor Market Monopsony," Journal of Labor Economics, University of Chicago Press, vol. 28(2), pages 203-210, April.
    49. Kevin Rinz, 2018. "Labor Market Concentration, Earnings Inequality, and Earnings Mobility," CARRA Working Papers 2018-10, Center for Economic Studies, U.S. Census Bureau.
    50. José Azar & Ioana Marinescu & Marshall Steinbaum, 2019. "Measuring Labor Market Power Two Ways," AEA Papers and Proceedings, American Economic Association, vol. 109, pages 317-321, May.
    51. Christian Dustmann & Attila Lindner & Uta Schönberg & Matthias Umkehrer & Philipp vom Berge, 2022. "Reallocation Effects of the Minimum Wage," The Quarterly Journal of Economics, President and Fellows of Harvard College, vol. 137(1), pages 267-328.
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    More about this item

    Keywords

    labor markets; oligopsony; monopsony; competition policy;
    All these keywords.

    JEL classification:

    • J21 - Labor and Demographic Economics - - Demand and Supply of Labor - - - Labor Force and Employment, Size, and Structure
    • J23 - Labor and Demographic Economics - - Demand and Supply of Labor - - - Labor Demand
    • J42 - Labor and Demographic Economics - - Particular Labor Markets - - - Monopsony; Segmented Labor Markets
    • K21 - Law and Economics - - Regulation and Business Law - - - Antitrust Law
    • L11 - Industrial Organization - - Market Structure, Firm Strategy, and Market Performance - - - Production, Pricing, and Market Structure; Size Distribution of Firms

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